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Xi (ξ) Ursae Majoris

Yellow Solar-type Star

Right Ascension 11h 18m 11s Best Seen 2/15 - 7/15
Declination 31° 31' 47" Magnitude 3.79
Constellation Ursa Major
Actual Compared to Sun
Distance ~11.4 ly --
Actual Brightness -- --
Surface Temperature ~6000 °K ~1.03
Diameter -- --
Mass -- --
Surface Gravity -- --
Surface Composition (by mass) 74% hydrogen
24% helium
2% everything else
same
Spectral Type G0 V G2 V
Density (gram/cubic cm) -- --

What To Look For Through The Telescope


  1. Recommended eyepiece: 24mm or 40 mm.

  2. When people look through the telescope they should see a faint star. It may appear to be a pale yellow.


Xi Ursae Majoris Information:


  1. First binary star system ever discovered in May 2, 1780, by Sir William Herschel.

  2. Xi Ursa Major is a multiple star system. It’s also the first multiple star system to have its orbit calculated (in 1828).

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References
Item Updated Notes
Coordinates 2003-11-26 SIMBAD 11 18 11 + 31 31 44
Hipparcos 11 18 11 + 31 31 50
Magnitude 2003-11-26 SIMBAD 3.78
Hipparcos 3.79
Distance 2003-11-26 SIMBAD parallax n/a
Hippparcos parallax n/a
Actual Brightness --
Surface Temperature --
Diameter --
Mass --
Surface Gravity --
Surface Composition 2003-11-26 OK for all stars
Spectral Type 2003-11-26 SIMABD, Hipparcos G0V
Density --
Other Information 2003-11-26 http://www.dibonsmith.com/uma_xi.htm